Meaning of oxazine

ox•a•zine

Pronunciation: (ok'su-zēn", -zin), [key]
— n. Chem.
  1. any of a group of 13 compounds having the formula CHNO, the atoms of which are arranged in a six-membered ring.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.